Abstract

Tetrachaelasma southwardi Newman & Ross, 1971, a bathylasmatine balanomorph, has been recorded from the Mar del Plata Submarine Canyon (ca. 38°S, off the coast of Argentina), at two stations located at significantly different depths (1950 m and 2934 m). A total of 29 specimens, complete or damaged but with soft parts intact, were collected. This unusually large number of well-preserved specimens allows us to add supplementary descriptions and document intraspecific morphological variations. The differences between T. southwardi and T. tasmanicum Buckeridge, 1999, the second species of this genus, are re-evaluated. A map and an updated list including all the records of the genus Tetrachaelasma Newman & Ross, 1971 are provided. The distribution of the genus Tetrachaelasma in the Southern Ocean is discussed. Furthermore, a single specimen of another bathylasmatine balanomorph, which was assigned to the genus Bathylasma Newman & Ross, 1971, was also obtained at the 1950 m station herein studied. This is the first record of the genus Bathylasma from the South-West Atlantic. This specimen has one T. southwardi attached to it, marking the first time that members of these two genera have been found living together.

Addeddate

2024-09-17 01:54:53

Bhl_virtual_titleid

165999

Bhl_virtual_volume

v.100:no.2 (2024)

Call number

10_3897_zse_100_118912

Call-number

10_3897_zse_100_118912

Foldoutcount

0

Genre

article

Identifier

onoccurrencedee100chie

Identifier-ark

ark:/13960/s255phwsmzp

Identifier-bib

10_3897_zse_100_118912

Identifier-doi

10.3897/zse.100.118912

Issue

2

Ocr

tesseract 5.3.0-6-g76ae

Ocr_detected_lang

en

Ocr_detected_lang_conf

1.0000

Ocr_detected_script

Latin

Ocr_detected_script_conf

1.0000

Ocr_module_version

0.0.21

Ocr_parameters

-l eng

Page_number_confidence

84

Page_number_module_version

1.0.5

Page_range

603-623

Pages

21

Pdf_degraded

invalid-jp2-headers

Pdf_module_version

0.0.25

Possible copyright status

In copyright. Digitized with the permission of the rights holder.

Ppi

300

Source

Zoosystematics and Evolution 100(2)

Year

2024

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